NB early time!
Bus numbers 37, 20, 100 and 110 stop at Galgeberg. Pub is just a minute walk from the bus stop.
Alternative is t-bane to Tøyen or Ensjø, but keep in mind that it doesn't operate between Majorstuen and Grønnland during Easter.
A-to-B run. Run starts at 17:00 at The Times Bar at Galgeberg. Come earlier for pre-run beer. Bring a ding-dong for a drink stop and cash or plastic for beers at B. B serves food.